DE29512886U1 - drill - Google Patents

Description

Password: Interchangeable head

Company Gustav Weber Knuckleduster Tool Factory,
Hahnerbergerstr. 137-139, 42349 Wuppertal

drill

The invention relates to a drill, in particular for drilling holes in wood, chipboard and blockboard as well as in plastic-coated boards or the like, with a cutting head located at one end of the drill shaft, which is provided with cutting edges on its edge areas that interact with main cutting edges located on the underside of the cutting head and a centering point, the drill having means for replacement. Drills of this type are known in numerous designs. The means for replacement usually consist in the complete drill, i.e. the shaft with the cutting head, being mounted in a three-jaw chuck, and the drill can be replaced by screwing on this three-jaw chuck. This type of tool change requires the use of an additional tool key to screw on the three-jaw chuck and is cumbersome and time-consuming. In addition, there is sometimes a risk that the end of the shaft in the three-jaw chuck will become jammed, especially when screwing it in. Also known are drills that have a thread on the side of the shaft facing away from the cutting head for

TELEPHONE (0202) 557022 COMMERZBANK.ÄG "I CJREIST- U.'VOLkSBANJC Efci &iacgr; POSTGIROAMT VAT-No.

TELEX S59I606 wpatd WUPPERTAL 4 ä2?S<?5 ** ** VUPWRTWio3?9OO14 ** ** COLOGNE 72634-506 DE 12l055<m

Attachment to an extension rod or in the drilling device. The use of these means also has disadvantages: firstly, replacing the drill by unscrewing and screwing it on is again cumbersome, and secondly, the drilling tool can get stuck in the thread.

The invention is based on the task of improving the known replaceable drill while retaining the previous advantages in such a way that they can be replaced in a simpler way than before. The drill to be created should be easy and variable to handle.

The object is achieved according to the invention in that the drill has an exchangeable cutting head. This makes it possible for the first time to replace the drilling tool used by simply changing the cutting head. It is no longer necessary to replace the shaft of the drill; instead, the same shaft can be used for different cutting heads in terms of size and type. The drill according to the invention is easy and variable to handle.

In the preferred embodiment of the drill according to the invention, the replaceable cutting head is designed as a plug-in tool. This makes the cutting head replaceable in a structurally simple manner.

According to a further proposal of the present invention, the replaceable cutting head designed as a plug-in tool has a receptacle for securing a square shaft end.

&bull; ■ ·

In another embodiment, the replaceable cutting head designed as a plug-in tool has a holder for securing a hexagon shaft end.

In a further alternative of the present invention, the replaceable cutting head designed as a plug-in tool has a receptacle for securing a cylinder shaft end with an anti-twisting device.

According to a further proposal of the present invention, the replaceable cutting head designed as a plug-in tool has a receptacle for securing a conical shaft end with an anti-twisting device.

According to another proposal of the present invention, the replaceable cutting head designed as a plug-in tool has a square shaft piece for securing in a corresponding receptacle located at the end of the shaft. In such an embodiment, in which the receptacle is located at the end of the shaft, the interchangeable cutting head that interacts with it can be produced more economically.

In another embodiment, the replaceable cutting head designed as a plug-in tool has a hexagonal shaft piece for securing in a corresponding receptacle located at the end of the shaft.

According to a further possibility of the present invention, the replaceable cutting head designed as a plug-in tool has a cylindrical shaft piece for securing in a corresponding receptacle located at the end of the shaft with an anti-twisting device.

Finally, in a further embodiment of the present invention, the replaceable cutting head designed as a plug-in tool

· 3·

a conical shaft piece for fixing in a corresponding holder located at the end of the shaft with an anti-twisting device.

It is recommended that the respective receptacle has at least one recess for interaction with at least one release ball located on the respective shaft end or the respective shaft section.

According to another proposal of the present invention, it is expedient that the respective receptacle has at least one magnetic element for interacting with at least one counter-magnetic element located on the respective shaft end or the respective shaft section.

According to a further proposal of the present invention, the respective receptacle has at least one bore for interacting with at least one locking pin interacting with corresponding bores in the respective shaft end or the respective shaft piece.

According to a further embodiment, the respective receptacle has at least one holding element such as a clip, spring or the like for cooperating with at least one counter-holding element such as a cam, edge or the like located on the respective shaft end or the respective shaft piece. This embodiment has the advantage that additional holding elements such as locking pins, magnetic elements etc. can be dispensed with at the connection point.

In an alternative embodiment, the respective shaft end or the respective shaft section has at least one holding element (clamp, spring or the like) for interacting with at least one counter-holding element such as a cam, edge or the like located on the respective receptacle.

According to a further proposal of the present invention, the replaceable cutting head is designed as a screw-on tool.

It is also recommended that the replaceable cutting head has an additional holding device for interaction with the respective shaft end or the respective holder.

According to a further proposal of the present invention, the drill with replaceable cutting head is designed as a Forstner drill.

In another embodiment of the present invention, the drill with replaceable cutting head is designed as an artificial drill.

In a further embodiment of the present invention, the drill with replaceable cutting head is designed as a hard metal-tipped artificial drill.

In a modified embodiment of the present invention, the drill with replaceable cutting head is designed as a hard metal drill with replaceable hard metal cutting plate.

If necessary, it is also advantageous for the drill bit shaft to have an extension piece.

According to a final proposal of the present invention, interchangeable shafts are provided for interaction with the shaft of the drill. In this way, the variable applicability of the drill according to the invention can be increased even further.

The invention is illustrated in several embodiments in the figures of the drawing. They show:

Fig. 1 shows a first embodiment of the drill according to the invention in a side view,

Fig. 2 shows a second embodiment of the drill according to the invention in a side view,

Fig. 3 shows a third embodiment of the drill according to the invention in a side view,

Fig. 4 shows a fourth embodiment of the drill according to the invention in a side view,

Fig. 5 shows a fifth embodiment of the drill according to the invention in a side view,

Fig. 6 a sixth embodiment of the drill according to the invention in a side view,

Fig. 7 shows a seventh embodiment of the drill according to the invention in a side view,

Fig. 8 an eighth embodiment of the drill according to the invention in a side view,

Fig. 9 shows a side view of the connection point shaft end, shaft piece holder of the various embodiments with release ball,

Fig. 10 shows a side view of the connection point shaft end, shaft piece holder of the various embodiments

with magnetic elements,

Fig. 11 a side view of the connection point shaft end, shaft piece holder with locking pin,

Fig. 12 a side view of the connection point shaft end, shaft piece holder of the various embodiments with holding element on the holder,

Fig. 13 a side view of the connection point shaft end, shaft piece holder of the various embodiments with holding element on the shaft end or shaft piece,

Fig. 14 another embodiment of the drill according to the invention with a cutting head designed as a screw-on tool,

Fig. 15 is a side view of the drill bit according to the invention designed as a Forstner bit,

Fig. 16 is a side view of a drill according to the invention designed as an artificial drill,

Fig. 17 is a side view of a drill according to the invention designed as a hard metal-tipped artificial drill,

Fig. 18 is a side view of a drill according to the invention designed as a hard metal drill with a replaceable hard metal cutting plate,

Fig. 19 a side view of the drill according to the invention with an extension shaft,

Fig. 20 is a side view of the drill according to the invention with a
changeable.

The drill according to the invention is generally designated 10. It is used in particular for drilling holes in wood, chipboard and blockboard as well as in plastic-coated boards or the like and has a shaft 11 with a shaft end 12 and a cutting head 13 located on this shaft end 12. The cutting head 13 is provided with cutting edges 15 on its edge areas 14, which interact with main cutting edges 17 located on the underside 16 of the cutting head and a centering point 18, whereby the drill 10 according to the invention has means for replacing them. These means are implemented in the embodiments shown in such a way that the drill 10 has an interchangeable cutting head 13.

In the majority of the embodiments shown, the replaceable cutting head 13 is designed as a plug-in tool 19. In the embodiment according to Fig. 1 of the drawing, the replaceable cutting head 13 designed as a plug-in tool 19 has a receptacle 20 for securing a square shaft end 21 of the shaft 11.

In the embodiment according to Fig. 2 of the drawing, the replaceable cutting head 13 designed as a plug-in tool 19 has a receptacle 22 for securing a hexagonal shaft end 23 of the shaft 11.

In the embodiment according to Fig. 3 of the drawing, the replaceable cutting head 13 designed as a plug-in tool 19 has a receptacle 24 for securing a cylinder shaft end 25 of the shaft 11 with an anti-twist device 77. This anti-twist device 77 consists of

a web 79 located on the cylinder shaft end 25 and a cooperating groove 80 located in the receptacle 24.

In the embodiment according to Fig. 4 of the drawing, the replaceable cutting head 13 designed as a plug-in tool 19 has a receptacle 26 for securing a conical shaft end 27 of the shaft 11 with an anti-twist device 78. This anti-twist device 78 consists of a half-profile 81 located on the conical shaft end 27 and a half-profile 82 cooperating with it and located in the receptacle 26.

In the embodiment according to Fig. 5 of the drawing, the replaceable cutting head 13 designed as a plug-in tool 19 has a square shaft piece 28 for securing in a corresponding receptacle 29 located on the shaft end 12 of the shaft 11.

In the embodiment according to Fig. 6 of the drawing, the

Plug-in tool 19 designed, replaceable cutting head 13 a

Hexagonal shaft piece 30 for fixing in a corresponding receptacle 31 located on the shaft end 12 of the shaft 11.

In the embodiment according to Fig. 7, the replaceable cutting head 13 designed as a plug-in tool 19 has a cylinder shaft piece 32 for securing in a corresponding receptacle 33 located on the shaft end 12 of the shaft 11 with an anti-twist device 77. This anti-twist device 77 consists of a web 79 located on the cylinder shaft piece 32 and a groove 80 that interacts with it and is located in the receptacle 33.

In the embodiment according to Fig. 8 of the drawing, the replaceable cutting head 13 designed as a plug-in tool 19 has a conical shaft piece 34 for fixing in a corresponding recess on the shaft end 12.

of the shaft 11 with an anti-twisting device 78. This anti-twisting device 78 consists of a half-profile 81 located on the conical shaft piece 34 and a cooperating half-profile 82 located in the receptacle 35.

In Fig. 9 to 13 of the drawing, various possibilities are shown for securing the replaceable cutting head 13, designed as a plug-in tool 19, to the shaft 11. In the embodiment according to Fig. 9, the receptacle 20, 22, 24, 26, 29, 31, 33, 35 has at least one recess 36, 37, 38, 39, 40, 41, 42, 43 for interaction with at least one release ball 44 located on the shaft end 21, 23, 25, 27 or the shaft piece 28, 30, 32, 34. This possibility of connecting the recess and release ball can therefore be used for all the possibilities listed in Fig. 1 to 8. This also applies to the options listed in Fig. 10 to 13.

In the embodiment according to Fig. 10 of the drawing, the receptacle

20, 22, 24, 26, 29, 31, 33, 35 at least one magnetic element 45, 46, 47, 48, 49, 50, 51, 52 for interacting with at least one at the shaft end

21, 23, 25, 27 or the shaft piece 28, 30, 32, 34.

In the embodiment according to Fig. 11 of the drawing, the receptacle 20, 22, 24, 26, 29, 31, 33, 35 has at least one bore 54, 55, 56, 57, 58, 59, 60, 61 for interacting with at least one locking pin 63 interacting with corresponding bores 62 in the shaft end 21, 23, 25, 27 or the shaft piece 28, 30, 32, 34.

In the embodiment according to Fig. 12 of the drawing, the receptacle 20, 22, 24, 26, 29, 31, 33, 35 has at least one holding element 73 such as a clamp, spring or the like for cooperation with at least one on the shaft end

21, 23, 25, 27 or the shaft piece 28, 30, 32, 34, such as a cam, edge or the like.

In the embodiment according to Fig. 13 of the drawing, the shaft end 21, 23, 25, 27 or the shaft piece 28, 30 ₅ 32, 34 has at least one holding element 75 such as a clamp, spring or the like for cooperation with at least one counter-holding element 76 such as a cam, edge or the like located on the receptacle 20, 22, 24, 26, 29, 31, 33, 35.

In the embodiments according to Figures 9 to 13 of the drawing, in those with a cylinder shaft end or cylinder shaft piece (Fig. c in each case), an anti-twist device 77 is provided. This anti-twist device 77 consists of a web 79 located on the respective cylinder shaft end 25 or the cylinder shaft piece 32 and a groove 80 that interacts with it and is located in the receptacle 24, 33. In the corresponding embodiments with a conical shaft end or shaft piece (Fig. d in each case), an anti-twist device 78 is provided accordingly. This anti-twist device 78 consists of a half-profile 81 located on the respective conical shaft end 27 or shaft piece 34 and a half-profile 82 that interacts with it and is located in the receptacle 26, 35.

In the embodiment according to Fig. 14, the replaceable cutting head 13 is designed as a screw-on tool 64.

In the embodiments shown, it is conceivable that the replaceable cutting head 13 has an additional holding device for interaction with the shaft 11. For this purpose, Fig. 2 of the drawing shows, by way of example, that the replaceable cutting head 13 has an additional holding device 65 for interaction with the shaft end 23. This holding device

65 can also be provided accordingly in all other embodiments.

In the embodiment according to Fig. 15 of the drawing, the drill 10 with replaceable cutting head 13 is designed as a Forstner drill 66.

In the embodiment according to Fig. 16, the drill 10 with exchangeable cutting head 13 is designed as an artificial drill 67.

In the embodiment according to Fig. 17 of the drawing, the drill 10 with replaceable cutting head 13 is designed as a hard metal-tipped artificial drill 68.

In a modified embodiment according to Fig. 18, the drill 10 with replaceable cutting head 13 is designed as a hard metal drill 69 with replaceable hard metal cutting plate 70.

Fig. 19 of the drawing shows another embodiment of the drill according to the invention, in which the shaft 11 of the drill 10 has an extension piece 71.

Fig. 20 shows a final embodiment of the drill 10 according to the invention, in which interchangeable shafts 72 are provided for interaction with the shaft 11 of the drill 10.

In the drill 10 according to the invention, the drilling tool used can be replaced by simply changing the cutting head 13. This is possible, for example, by simply replacing the cutting head 13, which is designed, for example, as a plug-in tool 19. It is no longer necessary to replace the shaft 11 of the drill 10; instead, the shaft 11 can be used for different cutting heads 13 in terms of size and type.

The cutting heads 13, which are different in type and size, can advantageously be stored in wooden boxes or similar, which is very practical and also environmentally friendly.

The shaft 11 can be mounted in the drilling device with and without a slip clutch in a manner known per se, e.g. using a three- or four-jaw chuck, a thread or the like.

As already mentioned, the embodiments shown are only examples of implementations of the invention, which is not limited to them, but rather many other modifications and designs are possible. The drill according to the invention can have a different design than that shown in the figures in the drawing. A variable design of the connection point between the cutting head and the shaft end of the shaft is also conceivable, e.g. suitable for a quick-change holder with a holding magnet and/or a ball lock. It is also possible to transfer the basic idea of the invention to tools other than drills.

&bull; ··· Io ·

BUSE · MENTZEL · LUDEWIG

Authorised representatives before the European Patent Office

PO Box 201462
D-42214 Wuppertal

Unterdörnen 114 D-42283 Wuppertal

PATENT ATTORNEYS Dipl.-Phys. Buse Dipl.-Phys. Mentzel Dipl.-Ing. Ludewig

Wuppertal-Wuppertal,

Password: Interchangeable head

Gustav Weber Schlagringwerkzeug-Fabrik, Hahnerbergerstr. 137-139, 42349 Wuppertal

List of reference symbols:

10 drill 37 11 shaft 38 12 Shaft end 39 13 Cutting head 40 14 Marginal area (of 13) 41 15 Cutting edge (of 13) 42 16 Cutting head underside 43 17 Main cutting edge (of 13) 44 18 Centering point (of 13) 45 19 Plug-in tool 46 20 Recording (of 19) 47 21 Square shaft end 48 22 Recording (of 19) 49 23 Hexagonal shaft end 50 24 Recording (of 19) 51 25 Cylinder shaft end 52 26 Recording (of 19) 53 27 conical shaft end 54 28 Square shaft piece (on 13) 55 29 Recording (of 11 for 28) 56 30 Hexagonal shaft piece (on 13) 57 31 Recording (of 11 for 30) 58 32 Cylinder shaft piece (on 13) 59 33 Recording (of 11 for 32) 60 34 conical shaft piece (on 13) 61 35 Recording (of 11 for 34) 62 36 Recess (of 20)

Recess (of 22) Recess (of 24) Recess (of 26) Recess (of 29) Recess (of 31) Recess (of 33) Recess (of 3 5) Release ball Magnetic element (of 20) Magnetic element (of 22) Magnetic element (of 24) Magnetic element (of 26) Magnetic element (of 29) Magnetic element (of 31) Magnetic element (of 33) Magnetic element (of 35) Counter magnetic element Bore (of 20) Bore (of 22) Bore (of 24) Bore (of 26) Bore (of 29) Bore (of 31) Bore (of 33) Bore (of 3 5) Bore (in 21, 23, 25, 27 or 28, 30, 32, 34)

TELEPHONE (0202) 55 70 22
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Bank code 33040001 Bank code 330600 98 BLZ37OSOO5O

VAT No.

EN !21035

63 Locking pin

64 Screw-on tool

65 Holding device

66 Forstner bits 61 Artistic drills

68 carbide tipped drill bits

69 Carbide drills

70 carbide cutting insert

71 Extension piece

72 Changeable shaft

73 Holding element

74 Counterholding element

75 Holding element

76 Counterholding element

77 Anti-twist device

78 Anti-twist device

79 Bridge (of 77)

80 grooves (of 77)

81 half profile (of 78)

82 half profile (of 78)

&bull;2

Claims (23)

BUSE · MENTZEL · LUDEWIG ·""" Patent Attorneys Authorized representative before the European Patent Office Dipl.-Phys. Buse PO Box 2014 62 Unterdörnen 114 DipL-Phys. Mentzel D-42214 Wuppertal D-42283 Wuppertal Dipl.-Ing. Ludewig Wuppertal-Wuppertal, Password: Interchangeable head Company Gustav Weber Knuckleduster Tool Factory,
Hahnerberger Str. 137-139, 42349 Wuppertal Protection claims: 1.) Drill, in particular for drilling holes in wood, chipboard and blockboard as well as in plastic-coated boards or the like, with a cutting head located at one end of the drill shaft, which is provided with cutting edges on its edge areas, which interact with main cutting edges located on the underside of the cutting head and a centering point, the drill having means for replacement, characterized , that the drill (10) has a replaceable cutting head (13). 2.) Drill according to claim 1, characterized in that the exchangeable cutting head (13) is designed as a plug-in tool (19). 3.) Drill according to claim 2, characterized in that the replaceable cutting head (13) designed as a plug-in tool (19) has a receptacle (20) for securing a square shaft end (21). TELEPHONE (0202) 55 70 22 COMMERZBANK AQ* '". CREJDIT-'U. W'LKSBANK BG · · · POSTGIROAMT VAT-No. TELEX 8 591606 wpatd WUPPERTAL 4 !298t>5" " WPPET<YaL*lM 49*0*014 ** " COLOGNE 72634-506 DE !2103 FAX (0202) 571501 Bank code 330 40001 Bank code 33060098 Bank code 37010050 4.) Drill according to claim 2, characterized in that the replaceable cutting head (13) designed as a plug-in tool (19) has a receptacle (22) for securing a hexagonal shaft end (23). 5.) Drill according to claim 2, characterized in that the replaceable cutting head (13) designed as a plug-in tool (19) has a receptacle (24) for securing a cylinder shaft end (25) with an anti-twist device (77). 6.) Drill according to claim 2, characterized in that the replaceable cutting head (13) designed as a plug-in tool (19) has a receptacle (26) for securing a conical shaft end (27) with an anti-twist device (78). 7.) Drill according to claim 2, characterized in that the replaceable cutting head (13) designed as a plug-in tool (19) has a square shaft piece (28) for fixing in a corresponding receptacle (29) located on the shaft end (12). 8.) Drill according to claim 2, characterized in that the replaceable cutting head (13) designed as a plug-in tool (19) has a hexagonal shaft piece (30) for fixing in a corresponding receptacle (31) located on the shaft end (12). 9.) Drill according to claim 2, characterized in that the replaceable cutting head (13) designed as a plug-in tool (19) has a cylindrical shaft piece (32) for securing in a corresponding receptacle (33) located on the shaft end (12) with an anti-twist device (77). 10.) Drill according to claim 2, characterized in that the replaceable cutting head (13) designed as a plug-in tool (19) has a conical shaft piece (34) for fixing in a corresponding receptacle (35) located on the shaft end (12) with an anti-twist device (78). 11.) Drill according to one of claims 2 to 10, characterized in that the receptacle (20, 22, 24, 26, 29, 31, 33, 35) has at least one recess (36, 37, 38, 39, 40, 41, 42, 43) for interaction with at least one release ball (44) located on the shaft end (21, 23, 25, 27) or the shaft piece (28, 30, 32, 34). 12.) Drill according to one of claims 2 to 10, characterized in that the receptacle (20, 22, 24, 26, 29, 31, 33, 35) has at least one magnetic element (45, 46, 47, 48, 49, 50, 51, 52) for interaction with at least one counter-magnetic element (53) located on the shaft end (21, 23, 25, 27) or the shaft piece (28, 30, 32, 34). 13.) Drill according to one of claims 2 to 10, characterized in that the receptacle (20, 22, 24, 26, 29, 31, 33, 35) has at least one bore (54, 55, 56, 57, 58, 59, 60, 61) for interaction with at least one locking pin (63) interacting with corresponding bores (62) in the shaft end (21, 23, 25, 27) or the shaft piece (28, 30, 32, 34). 14.) Drill according to one of claims 2 to 10, characterized in that the receptacle (20, 22, 24, 26, 29, 31, 33, 35) has at least one Holding element (73) such as a clamp, spring or the like for interacting with at least one counter-holding element (74) such as a cam, edge or the like located on the shaft end (21, 23, 25, 27) or the shaft piece (28, 30, 32, 34). 15.) Drill according to one of claims 2 to 10, characterized in that the shaft end (21, 23, 25, 27) or the shaft piece (28, 30, 32, 34) has at least one holding element (75) such as a clamp, spring or the like for cooperation with at least one counter-holding element (76) such as a cam, edge or the like located on the receptacle (20, 22, 24, 26, 29, 31, 33, 35). 16.) Drill according to claim 1, characterized in that the replaceable cutting head (13) is designed as a screw-on tool (64). 17.) Drill according to one of claims 1 to 16, characterized in that the replaceable cutting head (13) has an additional holding device (65) for interaction with the shaft end (21, 23, 25, 27) or the receptacle (29, 31, 33, 35). 18.) Drill according to one of claims 1 to 17, characterized in that the drill (10) with replaceable cutting head (13) is designed as a Forstner drill (66). 19.) Drill according to one of claims 1 to 17, characterized in that the drill (10) with replaceable cutting head (13) is designed as an artificial drill (67). 20.) Drill according to one of claims 1 to 17, characterized in that the drill (10) with replaceable cutting head (13) is designed as a hard metal-tipped synthetic drill (68). 21.) Drill according to one of claims 1 to 17, characterized in that the drill (10) with replaceable cutting head (13) is designed as a hard metal drill (69) with replaceable hard metal cutting plate (70). 22.) Drill according to one of claims 1 to 21, characterized in that the shaft (11) of the drill (10) has an extension piece (71). 23.) Drill according to one of claims 1 to 21, characterized in that interchangeable shafts (72) are provided for interaction with the shaft (11) of the drill (10).